body {
  font-size: 12px ;
  margin: 0;
  background: #323232;
}
ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.tab {
  width: 300px;
}
.tab .tab-nav {
  height: 30px;
}
.tab .tab-nav li {
  float: left;
  margin-right: 5px;
  background: #767676;
  border-radius: 3px 3px 0 0;
}
.tab .tab-nav li a {
  display: block;
  height: 30px;
  padding: 0 20px;
  color: #fff;
  line-height: 30px;
  text-decoration: none;
}
.tab .tab-nav li.actived {
  background: #fff;
}
.tab .tab-nav li.actived a {
  color: #777;
}
.tab .content-warp {
  background: #fff;
  padding: 5px;
  height: 200px;
}
.tab .content-warp .content-item {
  position: absolute;
  width: 290px;
  height: 200px;
  overflow: hidden;
  display: none;
}
.tab .content-warp .content-item.current {
  display: block;
}
